.app-header {
  background: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 20px;
}

.logo h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
  color: #1890ff;
}

.logo a {
  text-decoration: none;
  color: inherit;
}

.header-right {
  display: flex;
  align-items: center;
}

.user-info {
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  transition: background-color 0.3s;
}

.user-info:hover {
  background-color: #f5f5f5;
}

.username {
  font-weight: 500;
  color: #333;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .header-content {
    padding: 0 15px;
  }
  
  .logo h1 {
    font-size: 1.2rem;
  }
  
  .username {
    display: none;
  }
} 